As well - try swapping tom3 and tom4, to see if there is a difference in the two pads.
Ok, made some great strides today. Good news is I learned some stuff about xtalk settings coming here, bad news is I discovered that the issue is with the individual drum pad.
I confirmed this by 1st switching the cables between both floor toms to see if tom3 input would cause issues on other tom, but it worked fine! (It was the first time I was able to hear tom3 sound like the rest). So I switched the cable inputs back. (Proves the module/cable is FINE)
Next I did the suggested tom swap & sure as hell the the same triggering issues began on perc3(tom4).. So there we go!
Now that I know one of my 12" drums is acting up what could I try? Open & inspect if rim piezo is loose?
I guess I'll have to call Alesis & see what they say.. Do they make you pay shipping for sending out broken drum?